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  • Removing a character from a string

    - by Prasanth Madhavan
    i have a string. I want to delete the last character of the string if it is a space. i tried the following code, str.erase(remove_if(str.begin(), str.end(), isspace), str.end()); but my g++ compiler gives me an error saying: error: no matching function for call to ‘remove_if(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, <unresolved overloaded function type>)’ please help.

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  • connection string reading data from excel in asp.net

    - by Greg
    Hello, I am trying to read data from excel file in asp.net. I have added the connection string to webConfig file: <add name="xls" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=HPM_DB.xls;Extended Properties=Excel 8.0"/> But it shows me an errormessage when I run this query: string query = "Select * from [IO_Definition$]"; IO_Definition is the name of the spreadsheet in my excel file. I also added the excel file to the App_Data folder of the website. The error is: The Microsoft Jet database engine could not find the object 'IO_Definition$'. Make sure the object exists and that you spell its name and the path name correctly. The thing is, when I write the absolute path of the excel file in the connectionString it does work. Is there anyway I can make it work without writing the absolute path? Thanks, Greg

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  • Sybase ODBC connection String with .net

    - by nitinkhanna
    Hi, I am having SYBASE 12.5 install on my server as well as my PC, I am unable to get the correct connection string. I have used the connectionstrings.com but unable to get the correct one. After runnig and making the connection Driver={Sybase ASE ODBC Driver};srvr=server_name;database=database_name;UID=user_name;PWD=pass; and some other combination of thic connection string I am getting the Datasource ="" Driver ="" DataBase="" ServerVersion = Invalid Operation. Connection is closed What am I suppose to correct in that. Please help. Thanks

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  • Copying non null-terminated unsigned char array to std::string

    - by karlphillip
    If the array was null-terminated this would be pretty straight forward: unsigned char u_array[4] = { 'a', 's', 'd', '\0' }; std::string str = reinterpret_cast<char*>(u_array); std::cout << "-> " << str << std::endl; However, I wonder what is the most appropriate way to copy a non null-terminated unsigned char array, like the following: unsigned char u_array[4] = { 'a', 's', 'd', 'f' }; into a std::string. Is there any way to do it without iterating over the unsigned char array? Thank you all.

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  • Lua Programming for PSP: Sending a string, then spliting that string

    - by Trey Andrews
    How do I send a string between 2 PSPs? Here is a test script: Script A Adhoc.init() Adhoc.connect() data1 = "Trey777" data2 = "This is a test!!..." Outdata = "Name"..data1.."text"..data2 function senddata() Adhoc.send(Outdata) end While true do screen.waitVblankStart() screen:flip() end Script B red = Color.new(255,0,0) Adhoc.init() Adhoc.connect() function recevmsg() data = Adhoc.recv() ----What do I here to split the text? ----print name to line '0,10' ----print text to line'0,20' end While true do screen.waitVblankStart() screen:flip() end Each script will be loaded onto a different PSP. One will send and one will receive. I need to know how does it split a string? string.find and sub return numbers, not text

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  • Java String Replace and null characters

    - by praspa
    Testing out someone elses code (of course it was ...) , I noticed a few JSP pages printing funky non-ascii characters. Taking a dip into the source I found this tidbit. // remove any periods from first name e.g. Mr. John --> Mr John firstName = firstName.trim().replace('.','\0'); Does replacing a character in a String with a null character even work in Java? I know that '\0' will terminate a c-string. Would this be the culprit to the funky characters? Thanks PR

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  • Performance intensive string splitting and manipulation in java

    - by juhanic
    What is the most efficient way to split a string by a very simple separator? Some background: I am porting a function I wrote in C with a bunch of pointer arithmetic to java and it is incredibly slow(After some optimisation still 5* slower). Having profiled it, it turns out a lot of that overhead is in String.split The function in question takes a host name or ip address and makes it generic: 123.123.123.123-*.123.123.123 a.b.c.example.com-*.example.com This can be run over several million items on a regular basis, so performance is an issue.

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  • A specific string format with a number and character together represeting a certain item

    - by sil3nt
    Hello there, I have a string which looks like this "a 3e,6s,1d,3g,22r,7c 3g,5r,9c 19.3", how do I go through it and extract the integers and assign them to its corresponding letter variable?. (i have integer variables d,r,e,g,s and c). The first letter in the string represents a function, "3e,6s,1d,3g,22r,7c" and "3g,5r,9c" are two separate containers . And the last decimal value represents a number which needs to be broken down into those variable numbers. my problem is extracting those integers with the letters after it and assigning them into there corresponding letter. and any number with a negative sign or a space in between the number and the letter is invalid. How on earth do i do this?

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  • Repeat String - Javascript

    - by brad
    What is the best or most concise method for returning a string repeated an arbitrary amount of times? The following is my best shot so far: function repeat(s, n){ var a = []; while(a.length < n){ a.push(s); } return a.join(''); }

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  • Does C++11 offer a better way to concatenate strings on the fly?

    - by Lohoris
    I've seen this answer, and I wonder (I hope) if C++11 has come up with a native better method to concatenate, and possibly format, strings. With "better" I mean actually really one-line, like in pretty much all higher level languages (bonus points if it supports something like python's "formatted string"%(tuple) syntax but I guess that's really hoping for too much). The ideal result should be something like: my_func("bla bla bla" << int(my_int) << "bla bla bla"); The only barely acceptable methods listed in that answer are the fastformat ones, but I wonder if C++11 managed to do better.

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  • Search a string to find which records in table are inside said string

    - by Improfane
    Hello, Say I have a string. Then I have a number of unique tokens or keywords, potentially a large number in a database. I want to search and find out which of these database strings are inside the string I provide (and get the IDs of them). Is there a way of using a query to search the provided string or must it be taken to application space? Am I right in thinking that this is not a 'full text search'? Would the best method be to insert it into the database to make it a full text search?

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  • java string detection of ip

    - by user384706
    Hi, Assume a java string that contains an IP (v4 or v6) or a hostname. What is the best way to detect among these cases? I am not interested so much on whether the IP is in valid range (e.g. 999.999.999.999 for IPv4). I am interested in just a way to detect if a String is a hostname or an IP (v4 or v6). Initially I though this: if(theString.indexOf("@")!=-1){ //Not an Ip } but I am not sure if I should always expect a format containing @ always. Thanks

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  • Determine if a string contains only alphanumeric characters (or a space)

    - by dreamlax
    I'm learning C++ and I am writing a function that determines whether a string contains only alphanumeric characters and spaces. I suppose I am effectively testing whether it matches the regular expression ^[[:alnum:] ]+$ but without using regular expressions. I have seen a lot of algorithms revolve around iterators, so I tried to find a solution that made use of iterators, and this is what I have: #include <algorithm> static inline bool is_not_alnum_space(char c) { return !(isalpha(c) || isdigit(c) || (c == ' ')); } bool string_is_valid(const std::string &str) { return find_if(str.begin(), str.end(), is_not_alnum_space) == str.end(); } Is there a better solution, or a “more C++” way to do this?

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  • php: problems with embedded apex in a string ?

    - by Patrick
    how can I write more embedded " and ' in php ? For example, I dunno how to write this html complete element with all apex: As you can see, I use '' for the php string. Then inside, I use "", but then I need another level of apix and I dunno how to write that one in my php document. (php thinks that the string is complete in the middle because it sees another ' before the end. $output .= '<img style="outline:none;" src="sites/default/unselect.png" alt="Unselect All" onclick='$(this).siblings('.form-item').each(function(index){ $('input:checkbox', this).attr('checked', ''); });'/>'; how can I solve this ? thanks

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  • Failed to convert parameter value from a Guid to a String

    - by user320460
    Hello, I am at the end of my knowledge and googled for the answer too but no luck :/ Week ago everything worked well. I did a revert on the repository, recreated the tableadapter etc... nothing helped. When I try to save in my application I get an SystemInvalidCastException at this point: PersonListDataSet.cs: partial class P_GroupTableAdapter { public int Update(PersonListDataSet.P_GroupDataTable dataTable, string userId) { this.Adapter.InsertCommand.Parameters["@userId"].Value = userId; this.Adapter.DeleteCommand.Parameters["@userId"].Value = userId; this.Adapter.UpdateCommand.Parameters["@userId"].Value = userId; return this.Update(dataTable); **<-- Exception occurs here** } } Everything is stuck here because a Guid - and I checked the datatable preview with the magnifier tool its really a true Guid in the column of the datatable - can not be converted to a string ??? How can that happen?

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  • Best practices for handling string in VC++?

    - by Hiren Gujarati
    As I am new to Visual C++, there are so many types for handling string. When I use some type and go ahead with coding but on next step, there are in-build functions that use other types & it always require to convert one type of string to other. I found so many blogs but so confused when see so many answers & try but some are working & some are not. Please give your answer or links that gives ultimate solution for handling different types of strings in visual c++.

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  • Print one word from a string in python

    - by Shai
    Hi, How can i print only certain words from a string in python ? lets say i want to print only the 3rd word (which is a number) and the 10th one while the text length may be different each time mystring = "You have 15 new messages and the size is 32000" thanks.

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  • string parsing and substring in c

    - by Josh
    I'm trying to parse the string below in a good way so I can get the sub-string stringI-wantToGet: const char *str = "Hello \"FOO stringI-wantToGet BAR some other extra text"; str will vary in length but always same pattern - FOO and BAR What I had in mind was something like: const char *str = "Hello \"FOO stringI-wantToGet BAR some other extra text"; char *probe, *pointer; probe = str; while(probe != '\n'){ if(probe = strstr("\"FOO")!=NULL) probe++ else probe = ""; // Nulterm part if(pointer = strchr(probe, ' ')!=NULL) pointer = '\0'; // not sure here, I was planning to separate it with \0's } Any help will be appreciate it.

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  • Python string formatting too slow

    - by wich
    I use the following code to log a map, it is fast when it only contains zeroes, but as soon as there is actual data in the map it becomes unbearably slow... Is there any way to do this faster? log_file = open('testfile', 'w') for i, x in ((i, start + i * interval) for i in range(length)): log_file.write('%-5d %8.3f %13g %13g %13g %13g %13g %13g\n' % (i, x, map[0][i], map[1][i], map[2][i], map[3][i], map[4][i], map[5][i]))

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  • All possible combinations of length 8 in a 2d array

    - by CodeJunki
    Hi, I've been trying to solve a problem in combinations. I have a matrix 6X6 i'm trying to find all combinations of length 8 in the matrix. I have to move from neighbor to neighbor form each row,column position and i wrote a recursive program which generates the combination but the problem is it generates a lot of duplicates as well and hence is inefficient. I would like to know how could i eliminate calculating duplicates and save time. int a={{1,2,3,4,5,6}, {8,9,1,2,3,4}, {5,6,7,8,9,1}, {2,3,4,5,6,7}, {8,9,1,2,3,4}, {5,6,7,8,9,1}, } void genSeq(int row,int col,int length,int combi) { if(length==8) { printf("%d\n",combi); return; } combi = (combi * 10) + a[row][col]; if((row-1)>=0) genSeq(row-1,col,length+1,combi); if((col-1)>=0) genSeq(row,col-1,length+1,combi); if((row+1)<6) genSeq(row+1,col,length+1,combi); if((col+1)<6) genSeq(row,col+1,length+1,combi); if((row+1)<6&&(col+1)<6) genSeq(row+1,col+1,length+1,combi); if((row-1)>=0&&(col+1)<6) genSeq(row-1,col+1,length+1,combi); if((row+1)<6&&(row-1)>=0) genSeq(row+1,col-1,length+1,combi); if((row-1)>=0&&(col-1)>=0) genSeq(row-1,col-1,length+1,combi); } I was also thinking of writing a dynamic program basically recursion with memorization. Is it a better choice?? if yes than I'm not clear how to implement it in recursion. Have i really hit a dead end with approach??? Thankyou Edit Eg result 12121212,12121218,12121219,12121211,12121213. the restrictions are that you have to move to your neighbor from any point, you have to start for each position in the matrix i.e each row,col. you can move one step at a time, i.e right, left, up, down and the both diagonal positions. Check the if conditions. i.e if your in (0,0) you can move to either (1,0) or (1,1) or (0,1) i.e three neighbors. if your in (2,2) you can move to eight neighbors. so on...

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